NSI45030AZT1G

Current Regulation/Management Overview

The NSI45030AZT1G is a linear constant current regulator IC designed for LED lighting applications. Manufactured by onsemi, it utilizes self-biased transistor technology to maintain a regulated output current of 30 mA with a tolerance of ±10%. The device supports both boost and buck topologies and operates within an input voltage range of 45 V. It features an adjustable output voltage and functions at a switching frequency of 1 MHz. Packaged in a SOT-223 (TO-261) surface-mount format, the component handles a power dissipation of 1.4 W and operates across a temperature range from -55°C to +150°C.

Current Regulation/Management Feature Summary

• Utilizes self-biased transistor technology for stable constant current regulation without external components.
• Provides negative temperature coefficient characteristics to prevent thermal runaway in LED circuits.
• Offers voltage surge suppression capabilities to protect connected LEDs from transient overvoltages.
• Achieves rapid response with activation at low anode-cathode voltage levels.

Current Regulation/Management Applications

• LED lighting driver circuits
• Commercial signage illumination systems
• Industrial indicator lighting

Current Regulation/Management Procurement Notes

Verify that the specific suffix AZT1G matches the required package type and tape/reel specifications for your assembly line. Confirm compliance with RoHS and REACH directives if environmental regulations apply to your manufacturing process. Ensure the supplier provides valid traceability documentation, particularly if automotive AEC-Q101 certification or PPAP requirements are necessary for your final product validation.

Current Regulation/Management Selection Notes

Select this component when a simple, cost-effective solution for regulating LED current is required without complex control circuitry. The 30 mA rating suits standard indicator LEDs or small arrays. Consider the SOT-223 package for adequate thermal management given the 1.4 W dissipation capability. Verify that the system's maximum voltage does not exceed the 45 V limit under all operating conditions.

Current Regulation/Management Part Context

This part belongs to the NSI45030 series of two-terminal LED drivers from onsemi. These devices function similarly to constant current diodes but offer higher power handling. The series includes variants with different current ratings and packages, such as the NSI45015W for lower current applications. The NSI45030AZT1G specifically denotes the 30 mA version in the SOT-223 package.

Current Regulation/Management Replacement Considerations

Direct substitutes include other parts from the NSI45030 family, such as NSI45030ZT1G or NSI45030AT1G, provided the package and current tolerance requirements align. Cross-reference pinouts and thermal characteristics when replacing with generic constant current regulators to ensure compatibility with existing PCB layouts.